The SRC SR4 series Airsoft Electric Guns feature a long lasting and durable external metal construction, nylon fiber hand guard, pistol grips, stock and fully functional dependable metal gearbox for all of the most extreme environments making this a weapon you can depend on. The iconic M4 and M16 series rifles date back to the Vietnam War and have evolved greatly over the years to create the design seen in this product. A piece that commemorates both the history and tecnological evolution of the M4/M16 Rifle, the SR4 Series Electric assault rifle is a unique product.